The WP-T-Wap WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the posted parameter found in the ~/wap/writer.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.13.2.
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38331
https://plugins.trac.wordpress.org/browser/wp-t-wap/tags/1.13.3/wap/writer.php#L34